Correct. The Greek chilia ete (χίλια ἔτη) is used six times. This emphasizes the reality and literal existence of a future Millennium. Yet there are Christians who refuse to accept what God has said.
Additional info:
The main evidences are:
1. There are no NT examples of chilioi meaning more or less than exactly a thousand.
2. It (chilioi) still means exactly a thousand when paired with other numbers.
3. It's uses in the bible (chilioi) are of exactly a thousand every single time it appears.
4. When an unknown amount is used, the word used is G5505 chilias (not chilioi G5507), and it is used twice in a row.
5. G5507 chilioi is never used in this double fashion.
6. The double appearance of G5505 chilias is not found in Revelation 20.
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Revelation is as much literal as it is symbolic such as the letters to the churches and various warnings about this or that, saints being overcome and killed and armies going here or there.
Revelation also uses a Greek word that can mean an unknown amount based on the idea of a thousand and it also uses a Greek word that can only mean a thousand. That's why it is essential to study all the words used in Revelation that have some relation to a thousand.
Here is an example using English to show how something written can have a literal use of exactly a thousand and also use something that means much more than a thousand.
A man is selling a piece of art that is historically important and valuable. He is asked how much he wants and he says, "I'm not sure but certainly thousands." A buyer replies, "I agree it's valuable but your asking price is too high and incalculable so I offer a thousand dollars."
So here we have something using the word thousand which is an unknown amount while we also have an exact amount of a thousand. Revelation also has the same usages of something using the word thousand which is an unknown amount while it also has a word that is an exact amount of a thousand.
Here we have a Greek word G1367 dischilioi. "Dis" means two or twice and chilioi (G5507) means a thousand so this word means two thousand. Naturally then if there was one chilioi (G5507) (found in Revelation 20) it would be exactly a thousand just as it is in every occurrence of the word in the NT.
G1367 dischilioi means 2,000. It cannot mean 10,000. It cannot mean 1,000. It has a fixed meaning.
In order to use Greek and speak of an unknown number the use of chilias G5505 which means a thousand but when used twice, it represents "thousands and thousands" which is an unknown amount.
Back to the story above. Someone in the future might read the story and try to argue that the buyers offer was more than a thousand because in a different culture and different language and in a different religion, in a book written thousands of years before that art story, they used a thousand as a figurative number. Well, that is completely unrelated to the art story and it's language and culture.